I just dug through my purchase history and pulled out some highlights below.
I've been disappointed with most mapping items I've purchased on amazon, but I'm trying this out on Thursday: https://www.amazon.com/dp/B07JL8LC9R/ref=cm_sw_r_cp_awdo_t1_lqNnCb2BCVTP2. The reviews suggest people received beat up tiles but mine are pristine.
Amazon has a lot of nice dice trays. I bought a large one more commonly used for gambling than dnd, but can't find the link.
Litko sells some fun mini stuff like https://www.amazon.com/dp/B00BFX86HU/ref=cm_sw_r_cp_awdb_t1_RrNnCb8AEJZSG.
This is my fav DM notebook: https://www.amazon.com/dp/B01M30OX7E/ref=cm_sw_r_cp_awdb_t1_EsNnCb3Y62H21.
I also purchased some lamination tools to help with paper minis from printableheroes.com. Turns out small thermal laminators are cheap, and self-seal laminating pockets can be even cheaper.
I'll add more if I can think of them!
I use a DM screen
I have these tiles set up on our gaming table. I bought enough so that I took some extras and cut them in half to make the edges straight. It just fits inside my gaming table.
I also have these tiles that I use on top of them. The hexes are hallways, and I can pre-draw my rooms to lay them down upon entry.
My Alexa will soon have a playlist.
A journal that I use for ideas and to track monster hp
3-ring binder with my adventures (we use a lot of DND Beyond, but I like paper for my story.